CX was still at T2 when I last went in late 2018.
I actually think CGK T2 is pretty good. It gets some bad stick (like JFK T7) but it's actually great for travellers who want to minimise the time required between the the roadside and the plane. I've done car-to-gate at CGK T2 in 8 minutes before... just slightly more than my car-to-gate record at JFK T7. You can't do that in huge modern terminals like CGK T3.
On the other hand, for travellers who like to get to the airport early and enjoy the lounge etc, I agree CGK T2 is not the place for that!